Question

The focal length of a concave mirror is 12 cm.
Where should an object of length 4 em be placed,
so that a real image of 1 cm length is formed ?
(1) 48 cm
(2) 3 cm
(3) 60 cm
(4) 15 cm​

Answer 1

Explanation:

(3) 60 answer 1/4=-12/-12x

x=48+12

x=60